<!DOCTYPE html>
<html>
    <script src="jquery-3.3.1.min.js"></script>
    <script src="classjs.js"></script>
    <link rel="stylesheet" type="text/css" href="classcs.css">
    <head>
        <meta charset="utf-8">
    </head>
    <body>
        <div id="choices">
            <button id="1">药学1</button>
            <button id="2">药基</button>
            <button id="3">药实</button>
        </div>
        <div id="weekchoice">
            <form action="">
                <select id="week"name="chooce week">
                    <option value="two" selected>12周</option>
                    <option value="three">13周</option>
                    <option value="four">14周</option>
                    <option value="five">15周</option>
                    <option value="six">16周</option>
                    <option value="seven">17周</output>
                </select>
            </form>
        </div>
        <table border="class">
            <tr><th>Monsday</th><th>1</th><th>2</th><th>3</th><th>4</th><th>5</th><th>6</th><th>7</th><th>8</th></tr>
            <tr id="monday">
                <td>&nbsp;</td>
                <td colspan="2" id="mon1"></td>
                <td colspan="2" id="mon2"></td>
                <td colspan="2" id="mon3"></td>
                <td colspan="2" id="mon4"></td>
            </tr>
            <tr><th>Tuesday</th><th>1</th><th>2</th><th>3</th><th>4</th><th>5</th><th>6</th><th>7</th><th>8</th></tr>
            <tr id="tuesday">    
                <td>&nbsp;</td>
                <td colspan="2" id="tue1"></td>
                <td colspan="2" id="tue2"></td>
                <td colspan="2" id="tue3"></td>
                <td colspan="2" id="tue4"></td>
            </tr>
            <tr><th>Wednesday</th><th>1</th><th>2</th><th>3</th><th>4</th><th>5</th><th>6</th><th>7</th><th>8</th></tr>
            <tr id="wednesday">    
                <td>&nbsp;</td>
                <td colspan="2" id="wed1"></td>
                <td colspan="2" id="wed2"></td>
                <td colspan="2" id="wed3"></td>
                <td colspan="2" id="wed4"></td>
            </tr>    
            <tr><th>Thursday</th><th>1</th><th>2</th><th>3</th><th>4</th><th>5</th><th>6</th><th>7</th><th>8</th></tr>
            <tr id="thursday">
                <td>&nbsp;</td>
                <td colspan="2" id="thu1"></td>
                <td colspan="2" id="thu2"></td>
                <td colspan="2" id="thu3"></td>
                <td colspan="2" id="thu4"></td>
            </tr>
            <tr><th>Friday</th><th>1</th><th>2</th><th>3</th><th>4</th><th>5</th><th>6</th><th>7</th><th>8</th></tr>
            <tr id="friday">
                <td>&nbsp;</td>
                <td colspan="2" id="fri1"></td>
                <td colspan="2" id="fri2"></td>
                <td colspan="2" id="fri3"></td>
                <td colspan="2" id="fri4"></td> 
            </tr>
        </table>
    </body>
</html>